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    • 5. 发明申请
    • SYSTEMS FOR AN ELECTROSTATIC STYLUS WITHIN A CAPACITIVE TOUCH SENSOR
    • 电容触摸传感器中的静电STYLUS系统
    • US20160132137A1
    • 2016-05-12
    • US14997968
    • 2016-01-18
    • Perceptive Pixel, Inc.
    • Jonathan WesthuesJefferson Y. Han
    • G06F3/0354
    • G06F3/03545G06F3/0416G06F3/044
    • Systems are described for transmitting and receiving signals in an active stylus for a capacitive touch sensor, for which the systems have at least one circuit for receiving a current from an electrode and for transmitting a voltage onto the electrode. The systems include components for receiving the current in a receiving mode, a switch, and a switchmode power supply circuit having at least a transformer and a diode, for which the diode is coupled to the transformer. In a transmission mode, there is means for electrically isolating at least some of the components configured for receiving the current in the receiving mode from the voltage formed across the stray capacitance. In the receiving mode, there is a means for electrically isolating at least some of the components configured for receiving the current in the receiving mode from an inductance of the transformer in the switchmode power supply circuit.
    • 描述了用于在用于电容式触摸传感器的有源触针中发送和接收信号的系统,其中系统具有用于从电极接收电流和用于将电压传输到电极上的至少一个电路。 该系统包括用于以接收模式接收电流的部件,开关和至少具有变压器和二极管的开关模式电源电路,二极管耦合到变压器。 在传输模式中,存在用于电隔离被配置为接收接收模式中的电流与杂散电容两端形成的电压的组件中的至少一些的装置。 在接收模式中,存在用于电隔离被配置为在接收模式中接收来自开关模式电源电路中的变压器的电感的组件中的至少一些组件的装置。